关键设计模式：Reflection（反思）

def fibonacci(n):
    if n <= 1:
        return n
    else:
        return fibonacci(n-1) + fibonacci(n-2)

检查此段代码的正确性，告诉我如何修改。考虑以下几点：

1. 代码是否能正确实现斐波那契数列的计算？
2. 有没有潜在的性能问题？
3. 代码的可读性如何？
4. 是否需要添加错误处理？

def fibonacci(n):
    if not isinstance(n， int) or n < 0:
        raise ValueError(`n must be a non-negative integer`)
    if n <= 1:
        return n
    a， b = 0， 1
    for _ in range(2， n + 1):
        a， b = b， a + b
    return b

This is an {{source_lang}} to {{target_lang}} translation, please provide the {{target_lang}} translation for this text.
Do not provide any explanations or text apart from the translation.
{{source_lang}}: {{source_text}}

{{target_lang}}:

Your task is to carefully read a source text and a translation from {{source_lang}} to {{target_lang}}, and then give constructive criticism and helpful suggestions to improve the translation.The source text and initial translation, delimited by XML tags <SOURCE_TEXT></SOURCE_TEXT> and <TRANSLATION></TRANSLATION>, are as follows:


<SOURCE_TEXT>
{{source_text}}
</SOURCE_TEXT>


<TRANSLATION>
{{translation_1}}
</TRANSLATION>


When writing suggestions, pay attention to whether there are ways to improve the translation's
(i) accuracy (by correcting errors of addition, mistranslation, omission, or untranslated text);
(ii) fluency (by applying {{target_lang}} grammar, spelling and punctuation rules, and ensuring there are no unnecessary repetitions);
(iii) style (by ensuring the translations reflect the style of the source text and takes into account any cultural context);
(iv) terminology (by ensuring terminology use is consistent and reflects the source text domain; and by only ensuring you use equivalent idioms {{target_lang}}).


Write a list of specific, helpful and constructive suggestions for improving the translation.
Each suggestion should address one specific part of the translation.
Output only the suggestions and nothing else.

Your task is to carefully read a source text and a translation from {{source_lang}} to {{target_lang}}, and then give constructive criticism and helpful suggestions to improve the translation. The final style and tone of the translation should match the style of {{target_lang}} colloquially spoken in {{country}}.


The source text and initial translation, delimited by XML tags <SOURCE_TEXT></SOURCE_TEXT> and <TRANSLATION></TRANSLATION>, are as follows:


<SOURCE_TEXT>
{{source_text}}
</SOURCE_TEXT>


<TRANSLATION>
{{translation_1}}
</TRANSLATION>


When writing suggestions, pay attention to whether there are ways to improve the translation's
(i) accuracy (by correcting errors of addition, mistranslation, omission, or untranslated text);
(ii) fluency (by applying {{target_lang}} grammar, spelling and punctuation rules, and ensuring there are no unnecessary repetitions);
(iii) style (by ensuring the translations reflect the style of the source text and takes into account any cultural context);
(iv) terminology (by ensuring terminology use is consistent and reflects the source text domain; and by only ensuring you use equivalent idioms {{target_lang}});


Write a list of specific, helpful and constructive suggestions for improving the translation.
Each suggestion should address one specific part of the translation.
Output only the suggestions and nothing else.

Your task is to carefully read, then edit, a translation from {{source_lang}} to {{target_lang}}, taking into account a list of expert suggestions and constructive criticisms.


The source text, the initial translation, and the expert linguist suggestions are delimited by XML tags <SOURCE_TEXT></SOURCE_TEXT>, <TRANSLATION></TRANSLATION> and <EXPERT_SUGGESTIONS></EXPERT_SUGGESTIONS> as follows:


<SOURCE_TEXT>
{{source_text}}
</SOURCE_TEXT>


<TRANSLATION>
{{translation_1}}
</TRANSLATION>


<EXPERT_SUGGESTIONS>
{{reflection}}
</EXPERT_SUGGESTIONS>


Please take into account the expert suggestions when editing the translation. Edit the translation by ensuring:


(i) accuracy (by correcting errors of addition, mistranslation, omission, or untranslated text);
(ii) fluency (by applying {{target_lang}} grammar, spelling and punctuation rules and ensuring there are no unnecessary repetitions);
(iii) style (by ensuring the translations reflect the style of the source text);
(iv) terminology (inappropriate for context, inconsistent use), or other errors.


Output only the new translation and nothing else.